//
//  StatusCell.swift
//  sinaWB
//
//  Created by 杨运旺 on 15/11/19.
//  Copyright © 2015年 杨运旺. All rights reserved.
//

import UIKit

/// 微博 Cell 中控件的间距数值
let StatusCellMargin: CGFloat = 12
/// 微博头像的宽度
let StatusCellIconWidth: CGFloat = 35

/// 微博Cell
class StatusCell: UITableViewCell {
    
    var viewModel:StatusViewModel?{
        didSet {
            // 设置工作
            topView.viewModle = viewModel
            contentLabel.text = viewModel?.status.text
            
            pictureView.viewModle = viewModel
            // 修改配图视图大小
            pictureView.snp_updateConstraints { (make) -> Void in
                make.width.equalTo(pictureView.bounds.width)
                make.height.equalTo(pictureView.bounds.height)
                
                // 根据配图数量修改配图视图顶部约束
                let offset = viewModel?.thumbnailUrls?.count == 0 ? 0 : StatusCellMargin
                make.top.equalTo(contentLabel.snp_bottom).offset(offset)
            }

        }
    }

    
    /// 根据视图模型计算行高
    ///
    /// - parameter viewModel: 视图模型
    ///
    /// - returns: 行高
    func rowHeight(vm: StatusViewModel) -> CGFloat {
        // 1. 设置视图模型
        viewModel = vm
        
        // 2. 更新约束
        layoutIfNeeded()
        
        // 3. 返回底部视图的最大高度
        return CGRectGetMaxY(bottomView.frame)
    }
    
    // MARK: - 构造函数
    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        
        setupUI()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    
    // MARK: - 懒加载控件
    /// 顶部视图
    private lazy var topView : StatusCellTopView = StatusCellTopView()
    /// 微博正文标签
    private lazy var contentLabel: UILabel = UILabel(title: "微博正文",
        fontSize: 15,
        color: UIColor.darkGrayColor(),
        screenInset: StatusCellMargin)
    /// 配图视图
    private lazy var pictureView : StatusCellPictureView = StatusCellPictureView()
    /// 底部视图
    private lazy var bottomView : StatusCellBottomView = StatusCellBottomView()
}

//MARK: - 设置界面
extension StatusCell{
    private func setupUI(){
        // 1.添加控件
        contentView.addSubview(topView)
        contentView.addSubview(contentLabel)
        contentView.addSubview(pictureView)
        contentView.addSubview(bottomView)
//        bottomView.backgroundColor = UIColor.redColor()
        // 2.自动布局
        // 1> 顶部视图
        topView.snp_makeConstraints { (make) -> Void in
            make.top.equalTo(contentView.snp_top)
            make.left.equalTo(contentView.snp_left)
            make.right.equalTo(contentView.snp_right)
            make.height.equalTo(2 * StatusCellMargin + StatusCellIconWidth)
        }
        // 2> 内容标签
        contentLabel.snp_makeConstraints { (make) -> Void in
            make.top.equalTo(topView.snp_bottom).offset(StatusCellMargin)
            make.left.equalTo(contentView.snp_left).offset(StatusCellMargin)
        }
        // 3> 配图视图
        pictureView.snp_makeConstraints { (make) -> Void in
            make.top.equalTo(contentLabel.snp_bottom).offset(StatusCellMargin)
            make.left.equalTo(contentView.snp_left).offset(StatusCellMargin)
            make.width.equalTo(300)
            make.height.equalTo(90)
        }
        // 4> 底部视图
        bottomView.snp_makeConstraints { (make) -> Void in
            make.top.equalTo(pictureView.snp_bottom).offset(StatusCellMargin)
            make.left.equalTo(contentView.snp_left)
            make.right.equalTo(contentView.snp_right)
            make.height.equalTo(44)
//            // 指定向下的约束
//            make.bottom.equalTo(contentView.snp_bottom)
        }
        
}
}
